1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * INET 802.1Q VLAN 4 * Ethernet-type device handling. 5 * 6 * Authors: Ben Greear <greearb@candelatech.com> 7 * Please send support related email to: netdev@vger.kernel.org 8 * VLAN Home Page: http://www.candelatech.com/~greear/vlan.html 9 * 10 * Fixes: 11 * Fix for packet capture - Nick Eggleston <nick@dccinc.com>; 12 * Add HW acceleration hooks - David S. Miller <davem@redhat.com>; 13 * Correct all the locking - David S. Miller <davem@redhat.com>; 14 * Use hash table for VLAN groups - David S. Miller <davem@redhat.com> 15 */ 16 17 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 18 19 #include <linux/capability.h> 20 #include <linux/module.h> 21 #include <linux/netdevice.h> 22 #include <linux/skbuff.h> 23 #include <linux/slab.h> 24 #include <linux/init.h> 25 #include <linux/rculist.h> 26 #include <net/p8022.h> 27 #include <net/arp.h> 28 #include <linux/rtnetlink.h> 29 #include <linux/notifier.h> 30 #include <net/rtnetlink.h> 31 #include <net/net_namespace.h> 32 #include <net/netns/generic.h> 33 #include <linux/uaccess.h> 34 35 #include <linux/if_vlan.h> 36 #include "vlan.h" 37 #include "vlanproc.h" 38 39 #define DRV_VERSION "1.8" 40 41 /* Global VLAN variables */ 42 43 unsigned int vlan_net_id __read_mostly; 44 45 const char vlan_fullname[] = "802.1Q VLAN Support"; 46 const char vlan_version[] = DRV_VERSION; 47 48 /* End of global variables definitions. */ 49 50 static int vlan_group_prealloc_vid(struct vlan_group *vg, 51 __be16 vlan_proto, u16 vlan_id) 52 { 53 struct net_device **array; 54 unsigned int vidx; 55 unsigned int size; 56 int pidx; 57 58 ASSERT_RTNL(); 59 60 pidx = vlan_proto_idx(vlan_proto); 61 if (pidx < 0) 62 return -EINVAL; 63 64 vidx = vlan_id / VLAN_GROUP_ARRAY_PART_LEN; 65 array = vg->vlan_devices_arrays[pidx][vidx]; 66 if (array != NULL) 67 return 0; 68 69 size = sizeof(struct net_device *) * VLAN_GROUP_ARRAY_PART_LEN; 70 array = kzalloc(size, GFP_KERNEL); 71 if (array == NULL) 72 return -ENOBUFS; 73 74 vg->vlan_devices_arrays[pidx][vidx] = array; 75 return 0; 76 } 77 78 static void vlan_stacked_transfer_operstate(const struct net_device *rootdev, 79 struct net_device *dev, 80 struct vlan_dev_priv *vlan) 81 { 82 if (!(vlan->flags & VLAN_FLAG_BRIDGE_BINDING)) 83 netif_stacked_transfer_operstate(rootdev, dev); 84 } 85 86 void unregister_vlan_dev(struct net_device *dev, struct list_head *head) 87 { 88 struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 89 struct net_device *real_dev = vlan->real_dev; 90 struct vlan_info *vlan_info; 91 struct vlan_group *grp; 92 u16 vlan_id = vlan->vlan_id; 93 94 ASSERT_RTNL(); 95 96 vlan_info = rtnl_dereference(real_dev->vlan_info); 97 BUG_ON(!vlan_info); 98 99 grp = &vlan_info->grp; 100 101 grp->nr_vlan_devs--; 102 103 if (vlan->flags & VLAN_FLAG_MVRP) 104 vlan_mvrp_request_leave(dev); 105 if (vlan->flags & VLAN_FLAG_GVRP) 106 vlan_gvrp_request_leave(dev); 107 108 vlan_group_set_device(grp, vlan->vlan_proto, vlan_id, NULL); 109 110 netdev_upper_dev_unlink(real_dev, dev); 111 /* Because unregister_netdevice_queue() makes sure at least one rcu 112 * grace period is respected before device freeing, 113 * we dont need to call synchronize_net() here. 114 */ 115 unregister_netdevice_queue(dev, head); 116 117 if (grp->nr_vlan_devs == 0) { 118 vlan_mvrp_uninit_applicant(real_dev); 119 vlan_gvrp_uninit_applicant(real_dev); 120 } 121 122 vlan_vid_del(real_dev, vlan->vlan_proto, vlan_id); 123 124 /* Get rid of the vlan's reference to real_dev */ 125 dev_put(real_dev); 126 } 127 128 int vlan_check_real_dev(struct net_device *real_dev, 129 __be16 protocol, u16 vlan_id, 130 struct netlink_ext_ack *extack) 131 { 132 const char *name = real_dev->name; 133 134 if (real_dev->features & NETIF_F_VLAN_CHALLENGED) { 135 pr_info("VLANs not supported on %s\n", name); 136 NL_SET_ERR_MSG_MOD(extack, "VLANs not supported on device"); 137 return -EOPNOTSUPP; 138 } 139 140 if (vlan_find_dev(real_dev, protocol, vlan_id) != NULL) { 141 NL_SET_ERR_MSG_MOD(extack, "VLAN device already exists"); 142 return -EEXIST; 143 } 144 145 return 0; 146 } 147 148 int register_vlan_dev(struct net_device *dev, struct netlink_ext_ack *extack) 149 { 150 struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 151 struct net_device *real_dev = vlan->real_dev; 152 u16 vlan_id = vlan->vlan_id; 153 struct vlan_info *vlan_info; 154 struct vlan_group *grp; 155 int err; 156 157 err = vlan_vid_add(real_dev, vlan->vlan_proto, vlan_id); 158 if (err) 159 return err; 160 161 vlan_info = rtnl_dereference(real_dev->vlan_info); 162 /* vlan_info should be there now. vlan_vid_add took care of it */ 163 BUG_ON(!vlan_info); 164 165 grp = &vlan_info->grp; 166 if (grp->nr_vlan_devs == 0) { 167 err = vlan_gvrp_init_applicant(real_dev); 168 if (err < 0) 169 goto out_vid_del; 170 err = vlan_mvrp_init_applicant(real_dev); 171 if (err < 0) 172 goto out_uninit_gvrp; 173 } 174 175 err = vlan_group_prealloc_vid(grp, vlan->vlan_proto, vlan_id); 176 if (err < 0) 177 goto out_uninit_mvrp; 178 179 err = register_netdevice(dev); 180 if (err < 0) 181 goto out_uninit_mvrp; 182 183 err = netdev_upper_dev_link(real_dev, dev, extack); 184 if (err) 185 goto out_unregister_netdev; 186 187 /* Account for reference in struct vlan_dev_priv */ 188 dev_hold(real_dev); 189 190 vlan_stacked_transfer_operstate(real_dev, dev, vlan); 191 linkwatch_fire_event(dev); /* _MUST_ call rfc2863_policy() */ 192 193 /* So, got the sucker initialized, now lets place 194 * it into our local structure. 195 */ 196 vlan_group_set_device(grp, vlan->vlan_proto, vlan_id, dev); 197 grp->nr_vlan_devs++; 198 199 return 0; 200 201 out_unregister_netdev: 202 unregister_netdevice(dev); 203 out_uninit_mvrp: 204 if (grp->nr_vlan_devs == 0) 205 vlan_mvrp_uninit_applicant(real_dev); 206 out_uninit_gvrp: 207 if (grp->nr_vlan_devs == 0) 208 vlan_gvrp_uninit_applicant(real_dev); 209 out_vid_del: 210 vlan_vid_del(real_dev, vlan->vlan_proto, vlan_id); 211 return err; 212 } 213 214 /* Attach a VLAN device to a mac address (ie Ethernet Card). 215 * Returns 0 if the device was created or a negative error code otherwise. 216 */ 217 static int register_vlan_device(struct net_device *real_dev, u16 vlan_id) 218 { 219 struct net_device *new_dev; 220 struct vlan_dev_priv *vlan; 221 struct net *net = dev_net(real_dev); 222 struct vlan_net *vn = net_generic(net, vlan_net_id); 223 char name[IFNAMSIZ]; 224 int err; 225 226 if (vlan_id >= VLAN_VID_MASK) 227 return -ERANGE; 228 229 err = vlan_check_real_dev(real_dev, htons(ETH_P_8021Q), vlan_id, 230 NULL); 231 if (err < 0) 232 return err; 233 234 /* Gotta set up the fields for the device. */ 235 switch (vn->name_type) { 236 case VLAN_NAME_TYPE_RAW_PLUS_VID: 237 /* name will look like: eth1.0005 */ 238 snprintf(name, IFNAMSIZ, "%s.%.4i", real_dev->name, vlan_id); 239 break; 240 case VLAN_NAME_TYPE_PLUS_VID_NO_PAD: 241 /* Put our vlan.VID in the name. 242 * Name will look like: vlan5 243 */ 244 snprintf(name, IFNAMSIZ, "vlan%i", vlan_id); 245 break; 246 case VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD: 247 /* Put our vlan.VID in the name. 248 * Name will look like: eth0.5 249 */ 250 snprintf(name, IFNAMSIZ, "%s.%i", real_dev->name, vlan_id); 251 break; 252 case VLAN_NAME_TYPE_PLUS_VID: 253 /* Put our vlan.VID in the name. 254 * Name will look like: vlan0005 255 */ 256 default: 257 snprintf(name, IFNAMSIZ, "vlan%.4i", vlan_id); 258 } 259 260 new_dev = alloc_netdev(sizeof(struct vlan_dev_priv), name, 261 NET_NAME_UNKNOWN, vlan_setup); 262 263 if (new_dev == NULL) 264 return -ENOBUFS; 265 266 dev_net_set(new_dev, net); 267 /* need 4 bytes for extra VLAN header info, 268 * hope the underlying device can handle it. 269 */ 270 new_dev->mtu = real_dev->mtu; 271 272 vlan = vlan_dev_priv(new_dev); 273 vlan->vlan_proto = htons(ETH_P_8021Q); 274 vlan->vlan_id = vlan_id; 275 vlan->real_dev = real_dev; 276 vlan->dent = NULL; 277 vlan->flags = VLAN_FLAG_REORDER_HDR; 278 279 new_dev->rtnl_link_ops = &vlan_link_ops; 280 err = register_vlan_dev(new_dev, NULL); 281 if (err < 0) 282 goto out_free_newdev; 283 284 return 0; 285 286 out_free_newdev: 287 free_netdev(new_dev); 288 return err; 289 } 290 291 static void vlan_sync_address(struct net_device *dev, 292 struct net_device *vlandev) 293 { 294 struct vlan_dev_priv *vlan = vlan_dev_priv(vlandev); 295 296 /* May be called without an actual change */ 297 if (ether_addr_equal(vlan->real_dev_addr, dev->dev_addr)) 298 return; 299 300 /* vlan continues to inherit address of lower device */ 301 if (vlan_dev_inherit_address(vlandev, dev)) 302 goto out; 303 304 /* vlan address was different from the old address and is equal to 305 * the new address */ 306 if (!ether_addr_equal(vlandev->dev_addr, vlan->real_dev_addr) && 307 ether_addr_equal(vlandev->dev_addr, dev->dev_addr)) 308 dev_uc_del(dev, vlandev->dev_addr); 309 310 /* vlan address was equal to the old address and is different from 311 * the new address */ 312 if (ether_addr_equal(vlandev->dev_addr, vlan->real_dev_addr) && 313 !ether_addr_equal(vlandev->dev_addr, dev->dev_addr)) 314 dev_uc_add(dev, vlandev->dev_addr); 315 316 out: 317 ether_addr_copy(vlan->real_dev_addr, dev->dev_addr); 318 } 319 320 static void vlan_transfer_features(struct net_device *dev, 321 struct net_device *vlandev) 322 { 323 struct vlan_dev_priv *vlan = vlan_dev_priv(vlandev); 324 325 vlandev->gso_max_size = dev->gso_max_size; 326 vlandev->gso_max_segs = dev->gso_max_segs; 327 328 if (vlan_hw_offload_capable(dev->features, vlan->vlan_proto)) 329 vlandev->hard_header_len = dev->hard_header_len; 330 else 331 vlandev->hard_header_len = dev->hard_header_len + VLAN_HLEN; 332 333 #if IS_ENABLED(CONFIG_FCOE) 334 vlandev->fcoe_ddp_xid = dev->fcoe_ddp_xid; 335 #endif 336 337 vlandev->priv_flags &= ~IFF_XMIT_DST_RELEASE; 338 vlandev->priv_flags |= (vlan->real_dev->priv_flags & IFF_XMIT_DST_RELEASE); 339 vlandev->hw_enc_features = vlan_tnl_features(vlan->real_dev); 340 341 netdev_update_features(vlandev); 342 } 343 344 static int __vlan_device_event(struct net_device *dev, unsigned long event) 345 { 346 int err = 0; 347 348 switch (event) { 349 case NETDEV_CHANGENAME: 350 vlan_proc_rem_dev(dev); 351 err = vlan_proc_add_dev(dev); 352 break; 353 case NETDEV_REGISTER: 354 err = vlan_proc_add_dev(dev); 355 break; 356 case NETDEV_UNREGISTER: 357 vlan_proc_rem_dev(dev); 358 break; 359 } 360 361 return err; 362 } 363 364 static int vlan_device_event(struct notifier_block *unused, unsigned long event, 365 void *ptr) 366 { 367 struct netlink_ext_ack *extack = netdev_notifier_info_to_extack(ptr); 368 struct net_device *dev = netdev_notifier_info_to_dev(ptr); 369 struct vlan_group *grp; 370 struct vlan_info *vlan_info; 371 int i, flgs; 372 struct net_device *vlandev; 373 struct vlan_dev_priv *vlan; 374 bool last = false; 375 LIST_HEAD(list); 376 int err; 377 378 if (is_vlan_dev(dev)) { 379 int err = __vlan_device_event(dev, event); 380 381 if (err) 382 return notifier_from_errno(err); 383 } 384 385 if ((event == NETDEV_UP) && 386 (dev->features & NETIF_F_HW_VLAN_CTAG_FILTER)) { 387 pr_info("adding VLAN 0 to HW filter on device %s\n", 388 dev->name); 389 vlan_vid_add(dev, htons(ETH_P_8021Q), 0); 390 } 391 if (event == NETDEV_DOWN && 392 (dev->features & NETIF_F_HW_VLAN_CTAG_FILTER)) 393 vlan_vid_del(dev, htons(ETH_P_8021Q), 0); 394 395 vlan_info = rtnl_dereference(dev->vlan_info); 396 if (!vlan_info) 397 goto out; 398 grp = &vlan_info->grp; 399 400 /* It is OK that we do not hold the group lock right now, 401 * as we run under the RTNL lock. 402 */ 403 404 switch (event) { 405 case NETDEV_CHANGE: 406 /* Propagate real device state to vlan devices */ 407 vlan_group_for_each_dev(grp, i, vlandev) 408 vlan_stacked_transfer_operstate(dev, vlandev, 409 vlan_dev_priv(vlandev)); 410 break; 411 412 case NETDEV_CHANGEADDR: 413 /* Adjust unicast filters on underlying device */ 414 vlan_group_for_each_dev(grp, i, vlandev) { 415 flgs = vlandev->flags; 416 if (!(flgs & IFF_UP)) 417 continue; 418 419 vlan_sync_address(dev, vlandev); 420 } 421 break; 422 423 case NETDEV_CHANGEMTU: 424 vlan_group_for_each_dev(grp, i, vlandev) { 425 if (vlandev->mtu <= dev->mtu) 426 continue; 427 428 dev_set_mtu(vlandev, dev->mtu); 429 } 430 break; 431 432 case NETDEV_FEAT_CHANGE: 433 /* Propagate device features to underlying device */ 434 vlan_group_for_each_dev(grp, i, vlandev) 435 vlan_transfer_features(dev, vlandev); 436 break; 437 438 case NETDEV_DOWN: { 439 struct net_device *tmp; 440 LIST_HEAD(close_list); 441 442 /* Put all VLANs for this dev in the down state too. */ 443 vlan_group_for_each_dev(grp, i, vlandev) { 444 flgs = vlandev->flags; 445 if (!(flgs & IFF_UP)) 446 continue; 447 448 vlan = vlan_dev_priv(vlandev); 449 if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING)) 450 list_add(&vlandev->close_list, &close_list); 451 } 452 453 dev_close_many(&close_list, false); 454 455 list_for_each_entry_safe(vlandev, tmp, &close_list, close_list) { 456 vlan_stacked_transfer_operstate(dev, vlandev, 457 vlan_dev_priv(vlandev)); 458 list_del_init(&vlandev->close_list); 459 } 460 list_del(&close_list); 461 break; 462 } 463 case NETDEV_UP: 464 /* Put all VLANs for this dev in the up state too. */ 465 vlan_group_for_each_dev(grp, i, vlandev) { 466 flgs = dev_get_flags(vlandev); 467 if (flgs & IFF_UP) 468 continue; 469 470 vlan = vlan_dev_priv(vlandev); 471 if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING)) 472 dev_change_flags(vlandev, flgs | IFF_UP, 473 extack); 474 vlan_stacked_transfer_operstate(dev, vlandev, vlan); 475 } 476 break; 477 478 case NETDEV_UNREGISTER: 479 /* twiddle thumbs on netns device moves */ 480 if (dev->reg_state != NETREG_UNREGISTERING) 481 break; 482 483 vlan_group_for_each_dev(grp, i, vlandev) { 484 /* removal of last vid destroys vlan_info, abort 485 * afterwards */ 486 if (vlan_info->nr_vids == 1) 487 last = true; 488 489 unregister_vlan_dev(vlandev, &list); 490 if (last) 491 break; 492 } 493 unregister_netdevice_many(&list); 494 break; 495 496 case NETDEV_PRE_TYPE_CHANGE: 497 /* Forbid underlaying device to change its type. */ 498 if (vlan_uses_dev(dev)) 499 return NOTIFY_BAD; 500 break; 501 502 case NETDEV_NOTIFY_PEERS: 503 case NETDEV_BONDING_FAILOVER: 504 case NETDEV_RESEND_IGMP: 505 /* Propagate to vlan devices */ 506 vlan_group_for_each_dev(grp, i, vlandev) 507 call_netdevice_notifiers(event, vlandev); 508 break; 509 510 case NETDEV_CVLAN_FILTER_PUSH_INFO: 511 err = vlan_filter_push_vids(vlan_info, htons(ETH_P_8021Q)); 512 if (err) 513 return notifier_from_errno(err); 514 break; 515 516 case NETDEV_CVLAN_FILTER_DROP_INFO: 517 vlan_filter_drop_vids(vlan_info, htons(ETH_P_8021Q)); 518 break; 519 520 case NETDEV_SVLAN_FILTER_PUSH_INFO: 521 err = vlan_filter_push_vids(vlan_info, htons(ETH_P_8021AD)); 522 if (err) 523 return notifier_from_errno(err); 524 break; 525 526 case NETDEV_SVLAN_FILTER_DROP_INFO: 527 vlan_filter_drop_vids(vlan_info, htons(ETH_P_8021AD)); 528 break; 529 } 530 531 out: 532 return NOTIFY_DONE; 533 } 534 535 static struct notifier_block vlan_notifier_block __read_mostly = { 536 .notifier_call = vlan_device_event, 537 }; 538 539 /* 540 * VLAN IOCTL handler. 541 * o execute requested action or pass command to the device driver 542 * arg is really a struct vlan_ioctl_args __user *. 543 */ 544 static int vlan_ioctl_handler(struct net *net, void __user *arg) 545 { 546 int err; 547 struct vlan_ioctl_args args; 548 struct net_device *dev = NULL; 549 550 if (copy_from_user(&args, arg, sizeof(struct vlan_ioctl_args))) 551 return -EFAULT; 552 553 /* Null terminate this sucker, just in case. */ 554 args.device1[sizeof(args.device1) - 1] = 0; 555 args.u.device2[sizeof(args.u.device2) - 1] = 0; 556 557 rtnl_lock(); 558 559 switch (args.cmd) { 560 case SET_VLAN_INGRESS_PRIORITY_CMD: 561 case SET_VLAN_EGRESS_PRIORITY_CMD: 562 case SET_VLAN_FLAG_CMD: 563 case ADD_VLAN_CMD: 564 case DEL_VLAN_CMD: 565 case GET_VLAN_REALDEV_NAME_CMD: 566 case GET_VLAN_VID_CMD: 567 err = -ENODEV; 568 dev = __dev_get_by_name(net, args.device1); 569 if (!dev) 570 goto out; 571 572 err = -EINVAL; 573 if (args.cmd != ADD_VLAN_CMD && !is_vlan_dev(dev)) 574 goto out; 575 } 576 577 switch (args.cmd) { 578 case SET_VLAN_INGRESS_PRIORITY_CMD: 579 err = -EPERM; 580 if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) 581 break; 582 vlan_dev_set_ingress_priority(dev, 583 args.u.skb_priority, 584 args.vlan_qos); 585 err = 0; 586 break; 587 588 case SET_VLAN_EGRESS_PRIORITY_CMD: 589 err = -EPERM; 590 if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) 591 break; 592 err = vlan_dev_set_egress_priority(dev, 593 args.u.skb_priority, 594 args.vlan_qos); 595 break; 596 597 case SET_VLAN_FLAG_CMD: 598 err = -EPERM; 599 if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) 600 break; 601 err = vlan_dev_change_flags(dev, 602 args.vlan_qos ? args.u.flag : 0, 603 args.u.flag); 604 break; 605 606 case SET_VLAN_NAME_TYPE_CMD: 607 err = -EPERM; 608 if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) 609 break; 610 if (args.u.name_type < VLAN_NAME_TYPE_HIGHEST) { 611 struct vlan_net *vn; 612 613 vn = net_generic(net, vlan_net_id); 614 vn->name_type = args.u.name_type; 615 err = 0; 616 } else { 617 err = -EINVAL; 618 } 619 break; 620 621 case ADD_VLAN_CMD: 622 err = -EPERM; 623 if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) 624 break; 625 err = register_vlan_device(dev, args.u.VID); 626 break; 627 628 case DEL_VLAN_CMD: 629 err = -EPERM; 630 if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) 631 break; 632 unregister_vlan_dev(dev, NULL); 633 err = 0; 634 break; 635 636 case GET_VLAN_REALDEV_NAME_CMD: 637 err = 0; 638 vlan_dev_get_realdev_name(dev, args.u.device2); 639 if (copy_to_user(arg, &args, 640 sizeof(struct vlan_ioctl_args))) 641 err = -EFAULT; 642 break; 643 644 case GET_VLAN_VID_CMD: 645 err = 0; 646 args.u.VID = vlan_dev_vlan_id(dev); 647 if (copy_to_user(arg, &args, 648 sizeof(struct vlan_ioctl_args))) 649 err = -EFAULT; 650 break; 651 652 default: 653 err = -EOPNOTSUPP; 654 break; 655 } 656 out: 657 rtnl_unlock(); 658 return err; 659 } 660 661 static int __net_init vlan_init_net(struct net *net) 662 { 663 struct vlan_net *vn = net_generic(net, vlan_net_id); 664 int err; 665 666 vn->name_type = VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD; 667 668 err = vlan_proc_init(net); 669 670 return err; 671 } 672 673 static void __net_exit vlan_exit_net(struct net *net) 674 { 675 vlan_proc_cleanup(net); 676 } 677 678 static struct pernet_operations vlan_net_ops = { 679 .init = vlan_init_net, 680 .exit = vlan_exit_net, 681 .id = &vlan_net_id, 682 .size = sizeof(struct vlan_net), 683 }; 684 685 static int __init vlan_proto_init(void) 686 { 687 int err; 688 689 pr_info("%s v%s\n", vlan_fullname, vlan_version); 690 691 err = register_pernet_subsys(&vlan_net_ops); 692 if (err < 0) 693 goto err0; 694 695 err = register_netdevice_notifier(&vlan_notifier_block); 696 if (err < 0) 697 goto err2; 698 699 err = vlan_gvrp_init(); 700 if (err < 0) 701 goto err3; 702 703 err = vlan_mvrp_init(); 704 if (err < 0) 705 goto err4; 706 707 err = vlan_netlink_init(); 708 if (err < 0) 709 goto err5; 710 711 vlan_ioctl_set(vlan_ioctl_handler); 712 return 0; 713 714 err5: 715 vlan_mvrp_uninit(); 716 err4: 717 vlan_gvrp_uninit(); 718 err3: 719 unregister_netdevice_notifier(&vlan_notifier_block); 720 err2: 721 unregister_pernet_subsys(&vlan_net_ops); 722 err0: 723 return err; 724 } 725 726 static void __exit vlan_cleanup_module(void) 727 { 728 vlan_ioctl_set(NULL); 729 730 vlan_netlink_fini(); 731 732 unregister_netdevice_notifier(&vlan_notifier_block); 733 734 unregister_pernet_subsys(&vlan_net_ops); 735 rcu_barrier(); /* Wait for completion of call_rcu()'s */ 736 737 vlan_mvrp_uninit(); 738 vlan_gvrp_uninit(); 739 } 740 741 module_init(vlan_proto_init); 742 module_exit(vlan_cleanup_module); 743 744 MODULE_LICENSE("GPL"); 745 MODULE_VERSION(DRV_VERSION); 746